PrimoChill 120mm CTR SFF Phase II High Flow D5 Enabled Reservoir System PMMA - Frosted NEW Compression Ring End Caps, NEW D5 Compatible Pump Head, Easy end cap removal for cleaning, Multi-Port End Cap: 4 ports (4 top inlets for return) Delrin compression end caps (optional Acrylic), Optional Colored Aluminum Compression Rings Includes Vortex Killer for vortex free operation, Rigid Mount Hardware and template Included Pre-Installed Ready To Use, Made in the USA. Laser Cut Acrylic Tubes, D5 Compatible Pump Head (Pump not included), Inner Diameter: 2.25 in (57mm), Outer Diameter: 2.50 in (63mm), Overall Length: 6.25 in (158.75mm) (without pump installed)